izzum\statemachine\StateMachine::performTransition PHP Method

    private function performTransition(Transition $transition, $message = null)
    {
        // every method in this core routine has hook methods, event handlers and
        // callbacks it can call during the execution phase of the
        // transition steps if they are available on the domain model.
        try {
            if (!$this->doCheckCanTransition($transition)) {
                // one of the guards returned false or transition not found on current state.
                return false;
            }
            // state exit action: performed when exiting the state
            $this->doExitState($transition);
            // the transition is performed, with the associated logic
            $this->doTransition($transition, $message);
            // state entry action: performed when entering the state
            $this->doEnterState($transition);
        } catch (Exception $e) {
            $this->handlePossibleNonStatemachineException($e, Exception::SM_TRANSITION_FAILED, $transition);
        }
        return true;
    }